Pharmacist&#39;s slab



March 27, 1934. J, w, JQHNSON 1,952,375.

PHARuAcIsI-s SLAB Filed Feb. 10, 1953 nventor BH l l r l O n Gttornegs.

Patented Mar. 27, 1934 UNITED STATES PATENT loI-Flola 3 Claims.

This invention relates to a slab or support designed for use by pharmacists, doctors, or the like, in mixing salves or pastes, the primary object of the invention being to provide a slab hav- .5 ing means for supporting a roll of paper at one end thereof, the paper to be extended over the working surface of the slab, so that a clean surface may be provided by merely tearing oif and discarding the used section of the paper.

An important objection of the invention is to provide a slab of this character which may be secured in a horizontal position, insuring against movement of the slab within its frame.

A still further object of the invention is to provide a frame in which the slab is held, the slab being so mounted that the paper strip supported at one end of the slab, will be clamped by one end of the slab, means being provided for securing the opposite end of the paper strip, thereby securely holding the paper strip against movement.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure 1 is a plan View of a pharmacists slab constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view ,35, through the slab.

Referring to the drawing in detail, the device embodies a rectangular frame indicated generally by the reference character 5, the fame being of a heighth to support the slab, to be herein- '40v after more fully described, in spaced relation with a supporting surface.

The end member 6 of the frame 5, is substantially wide and provided with an extension 7, extending inwardly and overlying one end of the slab proper indicated at 8, the slab embodying a rectangular board, of a size to fit within the frame, leaving a space between the slab and frame, so that the slab may pivot or swing within the frame.

Bolts indicated by the reference character 9,

constructed of glass, marble or the like, the upper member providing the working surface of the slab. 'Ihe upper member 10 is held in position by contact with the band 1l, which is secured in position around the slab, by means of screws that extend through openings in the band, and are embedded in the edges of the slab.

As clearly shown by the drawing, a roll of paper indicated at 13, is supported, between the side members of the frame, and is held in position by means of the set screws 14, the roll of paper being mounted in such a way that the paper may be unrolledfand stretched over the upper surface of the slab 8, thereby protecting the upper surface of the slab to prevent the paste or ointment mixed on the slab, from contacting with the upper member 10.

Thus it will be seen that due to this construction, the paper from the roll 13, will be clamped between the upper member 10 and the extension 7, securely holding this end of the strip of paper, to the mixing slab.

At the opposite end of the mixing slab, is a pivoted arm 15, which swings upwardly to release the strip of paper, but swings downwardly into engagement with the free end of the strip of paper to clamp the free end of the strip of paper to the slab. Formed in one edge of the pivoted arm 15, is a notch 16, which notch accommodates the set screw 17, secured to the frame, with the result that when the pivoted arm has been moved to its active or clamping position, the paper will be securely held in position, stretched over the slab.

It will thus be obvious when ointment or salve has been mixed on the paper strip, the pivoted arm 15 may be raised, and the slab 8 moved to release the paper, whereupon the strip of paper may be drawn'over the slab until the soiled portion thereof extends beyond the pivoted arm 15, whereupon the arm 15 may be swung downwardly engaging the paper, so that the paper may be torn from the slab, evenly.

It might be further stated, that when the pivoted arm 15 is moved to its active position and held by the set screw 17, the opposite end of the slab 8, is swung `upwardly gripping the paper between the slab and extension 7.

Having thus described the invention what is claimed is:

1. A device of the character described comprising a frame, an extension at one end of the frame, a slab pivotally mounted within the frame, a roll of sheet material supported at one end of the frame, said sheet material being extended over the slab and clamped between the slab and extension, and means for clamping the end of the sheet material.

2. A device of the character described com prising a frame, a slab pivotally supported within the frame, an extension at one end of the frame and overlying one end of the slab, a roll of sheet material supported at one end of the frame, said sheet material adapted to bevextended over 4the upper surface oi the slab, and clamped between the extension and slab at one end of the frame, a pivoted arm at the opposite end of the frame,

material at the opposite end of the frame, securing the sheet material in position.

3. A device of the character described, comprising a frame, a slab pivotally mounted within the frame, a roll of sheet material at one end of the frame, the sheet material adapted to be positioned over the slab and clamped between the slab and frame, and a clamping bar at one end of `the frame and exerting pressureon the paper and slab. for securing the paper on the slab.

JOSEPH W. JOHNSON.

and said pivoted arm adapted to clamp the sheetjl lOO 

